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Description:

This calculator uses the Antoine equation to solve for the vapor pressure of water given a temperature. In addition, it provides a vapor pressure versus temperature line graph and plot. The Antoine equation and its rearrangement to solve for pressure are below.

Antoine Constants for Water

Water Temperature

A

B

C

1 to 100 degrees Celsius

8.07131

1730.63

233.426

99 to 374 degrees Celsius

8.14019

1810.94

244.485

Notes,

1. The equation is valid from 1 to 374 degrees Celsius.
2. There is an over lap between 99 and 100 degrees Celsius where both sets of constants can be used.
3. The calculated pressure is the point in which water will boil at the entered temperature.
4. The equation uses Celsius for temperature and pressure is in mmHg.

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